61453345 has 4 divisors (see below), whose sum is σ = 73744020. Its totient is φ = 49162672.

The previous prime is 61453333. The next prime is 61453361. The reversal of 61453345 is 54335416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25979409 + 35473936 = 5097^2 + 5956^2 .

It is a cyclic number.

It is not a de Polignac number, because 61453345 - 2¹¹ = 61451297 is a prime.

It is a super-2 number, since 2×61453345² = 7553027223378050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6145330 + ... + 6145339.

It is an arithmetic number, because the mean of its divisors is an integer number (18436005).

Almost surely, 2^61453345 is an apocalyptic number.

It is an amenable number.

61453345 is a deficient number, since it is larger than the sum of its proper divisors (12290675).

61453345 is a wasteful number, since it uses less digits than its factorization.

61453345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12290674.

The product of its digits is 21600, while the sum is 31.

The square root of 61453345 is about 7839.2183921613. The cubic root of 61453345 is about 394.6224989220.

The spelling of 61453345 in words is "sixty-one million, four hundred fifty-three thousand, three hundred forty-five".